Hildon 2.2: the Hildon toolkit for Fremantle - gnome.org
Hildon 2.2: the Hildon toolkit for Fremantle - gnome.org
Hildon 2.2: the Hildon toolkit for Fremantle - gnome.org
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<strong>Hildon</strong> <strong>2.2</strong>:<br />
<strong>the</strong> <strong>Hildon</strong> <strong>toolkit</strong> <strong>for</strong> <strong>Fremantle</strong><br />
Maemo Summit 2009 – Westergasfabriek Amsterdam<br />
Alberto Garcia<br />
agarcia@igalia.com<br />
Claudio Saavedra<br />
csaavedra@igalia.com
Introduction
<strong>Hildon</strong> widgets library<br />
● Set of widgets built on top of GTK+<br />
● Created <strong>for</strong> Nokia devices based on <strong>the</strong> Maemo plat<strong>for</strong>m:<br />
–Nokia 770<br />
–Nokia N800<br />
–Nokia N810<br />
–Nokia N900<br />
● Released under <strong>the</strong> GNU LGPL<br />
● Used also in o<strong>the</strong>r projects (e.g Ubuntu Mobile)
Maemo 5 - <strong>Fremantle</strong><br />
● Maemo release <strong>for</strong> <strong>the</strong> Nokia N900<br />
● Modern, usable and finger-friendly UI<br />
● Completely revamped user interface, very different from all<br />
previous versions<br />
● <strong>Hildon</strong> <strong>2.2</strong>.0 released on 24 September 2009
<strong>Hildon</strong> 2.0: Modest<br />
http://www.flickr.com/photos/yerga/ / CC BY-NC 2.0
<strong>Hildon</strong> 2.0: Modest<br />
http://www.flickr.com/photos/yerga/ / CC BY-NC 2.0
<strong>Hildon</strong> <strong>2.2</strong>: Modest
<strong>Hildon</strong> <strong>2.2</strong>: Modest
<strong>Hildon</strong> source lines of code<br />
● <strong>Hildon</strong> 1.0 (16 Apr 2007): 23,026<br />
● <strong>Hildon</strong> 2.0 (10 Oct 2007): 23,690<br />
● <strong>Hildon</strong> <strong>2.2</strong>.0 (24 Sep 2009): 36,291
<strong>Hildon</strong> <strong>2.2</strong>: <strong>the</strong> <strong>Fremantle</strong> release<br />
● Applications as window stacked views<br />
● Buttons as central UI part<br />
● Scrollable widgets are touchable-friendly<br />
● Kinetic scrolling (<strong>Hildon</strong>PannableArea)
O<strong>the</strong>r goals<br />
● New and old-style applications can coexist<br />
● Maintain backward compatibility<br />
–No API breakage<br />
–UI style preserved (where possible)
MathJinni in <strong>Fremantle</strong>
New UI concepts
Window stacks<br />
● Hierarchical <strong>org</strong>anization of windows<br />
● Applications have a main view from which different<br />
subviews can be opened<br />
● Views: implemented with <strong>Hildon</strong>StackableWindow<br />
● Stacks: implemented with <strong>Hildon</strong>WindowStack
Demo
<strong>Hildon</strong>Button: title/value button
<strong>Hildon</strong>PannableArea<br />
● Pannable scrollable window<br />
● Configurable kinetic scrolling<br />
● Gesture detection support<br />
● Easy to port from GtkScrolledWindow<br />
● Based on <strong>the</strong> OpenMoko finger-scroll widget
Demo
<strong>Hildon</strong>TouchSelector and <strong>Hildon</strong>PickerDialog<br />
● Finger-friendly, pannable, multicolumn selector<br />
● Allows single or multiple selections<br />
● Uses GtkTreeView internally<br />
● Exposes GtkTreeModel and GtkCellLayout <strong>for</strong> ease of use<br />
● <strong>Hildon</strong>TouchSelectorEntry: enter non predefined items
<strong>Hildon</strong>PickerButton<br />
● Standard picker button based on <strong>Hildon</strong>TouchSelector<br />
● Inspired by GtkFontButton, GtkFileChooserButton, …<br />
● Finger-friendly replacement <strong>for</strong> GtkComboBox and<br />
GtKComboBoxEntry
<strong>Hildon</strong>DateButton and <strong>Hildon</strong>TimeButton<br />
● Buttons <strong>for</strong> time and date selection<br />
● Derived from <strong>Hildon</strong>PickerButton<br />
● Specialized <strong>Hildon</strong>TouchSelector (<strong>Hildon</strong>DateSelector and<br />
<strong>Hildon</strong>TimeSelector)
Demo
<strong>Hildon</strong>AppMenu<br />
● Simple and finger-friendly menu <strong>for</strong> applications<br />
● Replacement <strong>for</strong> <strong>the</strong> unsuitable Diablo menu<br />
● Standard UI <strong>for</strong> data filtering/<strong>org</strong>anization through "filters"
Demo
O<strong>the</strong>r important improvements<br />
● <strong>Hildon</strong>Banner and <strong>Hildon</strong>Note <strong>the</strong>ming improved<br />
● New progress indicator as window manager decoration<br />
● Text entries with hints<br />
● Action area in GtkTreeView
Development
Massive clean up and deprecation<br />
● There were many (highly) specialized widgets from Chinook<br />
and be<strong>for</strong>e<br />
● Decided to deprecate <strong>the</strong>m<br />
● Examples:<br />
–Code dialog<br />
–Password dialogs<br />
–Login dialog<br />
–<strong>Hildon</strong>Volumebar deprecated in favor of GtkScale
Problems using standard GTK+ widgets<br />
● Theming limitations (e.g. <strong>Hildon</strong>CheckButton)<br />
● Hard to make changes work with legacy applications:<br />
–Maemo 4 and earlier: designed <strong>for</strong> stylus<br />
–<strong>Fremantle</strong>: designed <strong>for</strong> fingers, that is, bigger widgets<br />
–If we supersize all old widgets we can break legacy<br />
applications layout<br />
● New API and helper functions to provide <strong>Fremantle</strong> style<br />
widgets
Maemo GTK+<br />
● Maemo GTK+ is a branch with changes specific to <strong>the</strong><br />
plat<strong>for</strong>m<br />
● We try to keep Maemo GTK+ maintainable and close to<br />
upstream, having only stuff that<br />
– It's on its way to be accepted upstream<br />
– It can only be achieved by modifying GTK+ widgets<br />
internally<br />
● O<strong>the</strong>r widget changes are implemented by subclassing<br />
GTK+ widgets in <strong>Hildon</strong>
Developing <strong>for</strong> <strong>Fremantle</strong><br />
● <strong>Fremantle</strong> apps: quite different from traditional GNOME<br />
apps<br />
● Compiling a GNOME app <strong>for</strong> <strong>Fremantle</strong> and getting a<br />
<strong>Fremantle</strong> style is just impossible<br />
● Extra ef<strong>for</strong>t and knowledge is necessary to achieve <strong>the</strong><br />
<strong>Fremantle</strong> style (but it's worth it)
Things to do<br />
● Make <strong>the</strong> <strong>toolkit</strong> more independent from hildondesktop/maemo<br />
● Analyze which features could be moved/adapted to GTK+<br />
● Provide frequent releases <strong>for</strong> <strong>the</strong> community<br />
● Work in new and interesting widgets toge<strong>the</strong>r with <strong>the</strong><br />
maemo developers community (hint: BOF later today!)<br />
● Color picker? Font picker? Circular touch selector? (hint:<br />
BOF later today!)
Contributing<br />
Mailing list:<br />
https://garage.maemo.<strong>org</strong>/mailman/listinfo/hildon-devel<br />
Code:<br />
Very soon in http://maemo.gitorious.<strong>org</strong>!<br />
Bugzilla:<br />
http://bugs.maemo.<strong>org</strong>
Questions?
Thank You
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